I'll work in most programming languages with varying degrees of competence, though I'll only reluctantly touch PHP or Perl code. I'm more interested in the libraries, tools, and the code that's built on top of the language.

Most of my scrap code lives on https://github.com/ringerc . Most of my open source code is in the form of scattered patches across too many different bugzillas and JIRAs, rather than single new projects. I contribute patches to PostgreSQL and work on BDR.

Most of my contribution is now non-code, in the form of:

Detailed bug reporting with test cases

User support for PostgreSQL on mailing lists and here on SE

PostgreSQL patch review and beta testing

Usability review

Writing, editing and enhancing documentation, HOWTOs, etc

Blogging in detail on topics likely to be useful to others.

I've turned into a git fiend and no longer understand why anybody uses anything else. I'm also becoming increasingly obsessive about testing, particularly with the advent of Jenkins CI and related tools.